Ore-concentrator



E1 DEISTER.

ons coNcgNnmoR. i 4 APPLICATION HLEQIUN 23, 1919. 41,381,862, i l Patented June` 14, 1921.

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ff v v3 INVENTOR.

E. DEISTEH--V GRE CONCENTRATOR.

`APPLICATION mien :uns 23, |919.

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INVENTOR,

BY ggMfM zx, AMAS..

ATTORNEY l UNITED STATES PATENT orifice. V

EMIL DEISTER, OF FORT WAYNE, INDIANA, ASSIGNOR TO DEIS/TER MACHINE COM- PANY, OF FORT WAYNE, INDIANA, A CORPORATION.'

ORE-CONCENTRATOR.

Application filed June 23, 1919.

To all whom it may concern Be it known that I, EMIL Dnrsrnn, a citizen of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana, have invented new and useful Improvements in Ore-Concentrators, of which the following is a specification.

The present invention relates to improvements in ore concentrating tables and particularly to the type wherein the table is in operation differentially reciprocated and is transversely inclined downwardly.

The object of the invention is to provide a table capable of treating a large quantity of ore, especially iron ore, and at the same time capable of maintaining a high efficiency in separating the iron or minerals from the gangue or waste.

In the accompanying drawings I have illustrated a table constructed in accordance with the invention in which- Figure l is a top plan view of the table;

Fig. 2 a longitudinal cross-section on line I-I of Fig. l; Fig. 3 a longitudinal crosssection on line II-II and line IIL-III of Fig. l; Fig. a a cross-section on line IIT-IV of Fig. l; Fig. 5 a cross-section on line V-V of Fig. 1; Fig. 6 a cross-section on line VI-VI of Fig. 1; Fig. 7 a crosssection on line VII-VII of Fig. l; and Fig 8 an enlarged cross-section of the preferred rifiies on the table, the rifHes being omitted in Figs. 5, 6 and 7.

Referring to the drawings, the deck l of the table is built in any suitable manner and is covered with linoleum, rubber or other suitable material 2. Riffles 3 are arranged on the covering in suitable manner. Any suitable mechanism known in the art may be employed for reciprocating the table differentially in the Vdirection indicated by arrow A, the table being supported in suitable manner to permit of said reciprocation and the supports being adjusted so that the general inclination of the surface of the deck will be downward from the head end 4 to the mineral discharge end 5 and from the feed side 6 toward the tailings discharge side 7. Feed box 8, which may be of any suitable construction, is arranged to direct material to be treated on the table adjacent the edge opposite the tailings discharge side 7, the line of feed beginning at the head end of the table and extending a suitable distance along the feed side 6 of the table.. The wash.

Specification of Letters Patent.

Patented June 11i, 1921.

Serial No. 305,977.

water box 9 extends along the feed side of the table from the feed box or from a point adjacent thereto, to the mineral discharge end of the table, the wash water bor; or launder being adapted to direct water onto the deck of the table for washing or dressing the materials as they travel over the surface of the deck under the iniuence of gravity and the driving mechanism.

The surface of the deck of the table, when the table is in operating position, is so constructed that the downward inclination of the same from the head end to he mineral discharge end is not uniform throughout but the said inclination is greatest adjacent the feed and dressing water side 6 and least along the tailings discharge side as shown in Figs. 3 and 2 respectively. The transverse downward inclination of the surface of the deck is also not uniform throughout the length of the table but is greatest adjacent the head end of the table and less adjacent the mineral discharge end thereof, as shown in Figs. 4, 5, 6 and 7.

Referring to Fig. l the surface of the deck is formed in a plurality of coterminous downwardly inclined sections, section a b c Z along the feed and dressing water side 6 of the table being relatively flat transversely in the operating position ofthe table; section b c e f g slopes uniformly downward from I) c to e g and from c e to Z9 g. Section c f 1T y' slopes downwardly fromV section ZJ c c g to the tailings discharge side with a` greater inclination than the transverse inclination downwardly of `section 7) c e g, the point e'. in the operating position of the table, being the lowest point in section le f z' y'. Section f g L z' alsoslopes downwardly from its coterminal line f i with section c f z' 7' to the mineral discharge end of the table, the said longitudinal inclination downwardly being less than the downward longitudinal inclination of any other section or part of the surface of the table in the operating position thereofyand in said operating position of the table the tailings discharge edge 71, c' of section 7 g h z is substantially horizontal. When the table is in operation a shallow valley is formed along the coterininal line y" between sections 7" f/ 7L c' and e f z' y', notwithstanding the downward slope of section f g h z' toward the mineral discharge end of the table.

'The material to treated is deposited on the deck beneath the feed box 8 and it tends, under the influence of gravity, to flow over the decktoward the tailings discharge side thereof. As the material travels down the slope the riiiies catch first the coarser mineral particles and then the liner mineral particles and the waste passes of! the table at the discharge side 7. rlhe caught mineral particles and the waste materials which may have been caught with them are caused to travel toward thernineral discharge end of the table under the influence of the driving mechanism. The dressing water discharging on the deck from box 9 washes ont the waste materials in the grooves and carries them over the tailings discharge side of the table and the-minerals.discharge at the mineral discharge end of the table.

The materials which reach section f g i z' are somewhat retarded in their movement by the decreasedinclination downward of that section toward both the mineral discharge end and the tailings discharge side of the table so that the wash water has ample opportunity to clean up the concentrates on that section .and prevent the waste materials fromv discharging at the mineral discharge end of the table. The valley formed between sections f g i c' and e f z' y' along their coterminal line is extremely valuablesince it cooperates with the said two sections to retard the progress of the `mate rials in the grooves toward the mineral discharge end of the deck and affords ,opportrinity for thorough cleaning up of the concentratesiby the wash water and thereby increasing the efhciency of Vthe table in marked degree. This function of the valley i and of sections e f z' 7' and 7 g 7i is especially valuable in the treatment of' iron ores.

In Fig. 8 l have illustrated a .form of rifile construction which is very effective on tables of the type described. rlhe riflies 10 are formed in groups of any suitable number in a group by cutting V-shaped grooves 11 in a block of wood. The opposite sides of each block are beveled or tapered to substaiitially a feather edge, and the blocks are secured to the deck side by side down the transverse slope of the deck with the beveled sides of adjacent blocks facing each other. The beveled sides of adjacent groups form between them grooves 12 which are wider and deeper than any of the grooves inthe blocks and since said adjacent sides are substantially beveled to a feather edge the swelling of a riiile by the water which flows over it will not cause it to lift its neighbor from the surface of the deck as would be the case were the opposing sides of the groups abrupt walls. The deep V- shaped grooves l2 are very effective in catching and conveying the coarser minerals in the feed toward the mineral discharge end of the table.

What I claim is: 1. A differentially reciprocating concentrating table having rifl'les thereon and havdownwardly, the transverse inclination down- Y ward of said lsecond section being greater than that of the first section, and a third section coterminous with both of the other two sections and extending along a portion of both the mineral discharge end and the tailings discharge side of the table, being longitudinally inclined downwardly from the second section to the mineral discharge end of the table and said longitudinal inclination downwardly being less than the longitudinal inclination downwardly of said second section, saidthird section also being transversely inclined downwardly from the first section to the tailings discharge side of the table, said transverse inclination downwardly of said third section being least at the mineral discharge end of the table* and greatest at the juncture of said section and the second section.

2. A differentially reciprocating concentrating table having rifiies thereon and having a plurality of coterminous sections on its surface, one section extending from the head end to the mineral discharge end of the table and adjacent the feed side thereof being both longitudinally and transversely inclined downwardly, asecond section` coterminous with the first section and extending therefrom along the mineral discharge end of the table'to the tailings discharge side thereof and a third section cotermiiious with both the first and second sections and extending along the-tailings discharge side of the table from the second section to the head end ofthe table and being both longitudinally and transversely inclined downwardly, `the transverse inclination downwardly of the third section being greater than theltransverse inclination downwardly of any other portion of the surface of the table. A l 3. A differentially reciprocating concentrating table having V-sha-ped grooves on its surface, 'some of the grooves being deeper and wider than the others, the'surface ofV the table being both v longitudinally and transversely inclined downwardly, the longitudinal inclination downwardly adjacent the feed side of the table-being greater than that adjacent the opposite or tailings discharge side and the transverse inclination downwardly adjacent the head end of the table being greater than that adjacent the opposite or mineral discharge end.

4:. In a dilerentially reciprocating concentrating table a plurality ofrifles on the surface of the table having V-shaped grooves between them, some of the grooves being deeper and wider than the remainder thereof, and the side walls of the deeper and wider grooves being tapered substantially to a feather edge at the surface of the table.

5. In a differentially reciprocating concentrating table a plurality of riles on the surface of the table extending from the head end to the opposite or mineral dis-charge end thereof, the riflies being formed in groups, those of each group being integral and having V-shaped grooves between them and the opposing sides of adjacent groups being tapered substantially to a feather edge at the surface of the table and forming between them V-shaped grooves which are deeper and wider than the V-shaped grooves between the riflies of any group.

In witness whereof I have hereunto subscribed iny name this 12th day of June, 1919.

EMIL DEISTER. 

